A summary of the emission inventory for the Treasure Valley, Idaho Metropolitan Area is presented. The pollutants which include sulfur oxides, particulates, carbon monoxide, hydrocarbons, and nitrogen oxides are delineated with respect to source type, season of the year, and geographical distribution within the area. The Study Area, which was chosen on the basis of population distribution and air pollution sources, consists of six counties in the western portion of the state of Idaho. A grid system was used to show geographical distribution of emissions within each of the counties. All sources of emissions were classified into five categories: transportation, stationary fuel combustion, industrial processes, refuse, and evaporative losses. (Author)